User blog comment:Finnalca/MIDDAY-MIDNIGHT-DUSK??/@comment-32358261-20180111060347

Midnight is more bulky (however not enough) and slower

Midday is fastest at a very good speed tier (however lack lustre movepool and ability)

Dusk hits the hardest but suffers from loads of speed ties.

The best is probably dusk. The main thing over the other 2 is tough claws as an ability. This form is unavailable in PBB from my knowledge